[SOLVED] Convert days, minutes, hours to seconds in Java Using Duration object failing

Convert days, minutes, hours to seconds in Java Using Duration object failing

Quiz duration is specified as days, hours and minutes each in integers.

I am trying to convert combination of these to seconds. Below code I tried. but it always returns 0 seconds. I am using jdk 6

Integer hours = 3, days=4, minutes=20;
javax.xml.datatype.Duration duration = DatatypeFactory.newInstance().newDuration(true, 0, 0, 
                    days, 
                    hours, 
                    minutes, 
                    0);  
Integer seconds = duration.getSeconds(); // It always returns zero

Please guide.

Solution

The JavaDocs for javax.xml.datatype.Duration.getSeconds() say

Obtains the value of the SECONDS field as an integer value, or 0 if not present. This method works just like getYears() except that this method works on the SECONDS field.

If you want to calculate the total amount of seconds this duration is representing, you will have to calculate them yourself, maybe like this (there may be better solutions):

private static int getInSeconds(javax.xml.datatype.Duration duration) {
    int totalSeconds = 0;
    totalSeconds += duration.getSeconds();
    totalSeconds += (duration.getMinutes() * 60);
    totalSeconds += (duration.getHours() * 60 * 60);
    totalSeconds += (duration.getDays() * 24 * 60 * 60);
    // ... calculate values for other fields here, too
    return totalSeconds;
}

For certain durations, an int will not be sufficient, keep that in mind, please.

Consider using java.time.Duration instead, if possible.

There is a backport of java.time for Java 6 and 7, but unfortunately, not for below.